1. Department of Pulmonary Diseases, Cancer Center Amsterdam, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
2. Department of Public and Occupational Health, Amsterdam Public Health Research Institute, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
3. Amsterdam UMC, Vrije Universiteit Amsterdam, Expertise Center for Palliative Care, Amsterdam, The Netherlands
4. Department of Pulmonary Diseases, Haags Medisch Centrum, Leidschendam, Zuid-Holland, The Netherlands
5. Department of Pulmonary Diseases, Flevoziekenhuis, Almere, Flevoland, The Netherlands